It is with heavy hearts that we share the deeply saddening news of the passing of actress Kelley Mack, who has died at the age of 33 after a courageous battle with health complications.

It is with heavy hearts that we share the deeply saddening news of the passing of actress Kelley Mack, who has died at the age of 33 after a courageous battle with health complications. Best known for her role as Addy on The Walking Dead, Kelley left a lasting impression on fans and colleagues alike with her immense talent, genuine spirit, and compassionate soul.

Kelley passed away peacefully on the evening of Saturday, August 2, 2025, surrounded by her beloved mother and aunt, according to a heartfelt message shared by her family on her Instagram account. Her passing follows a difficult fight with glioma, an aggressive and often incurable tumor that forms in the brain or spinal cord. Despite the seriousness of her diagnosis, Kelley faced her illness with bravery, grace, and strength that inspired everyone who knew her.

Born with a love for storytelling and the arts, Kelley Mack’s passion led her to a successful career in acting, modeling, and filmmaking. While she played several roles throughout her career, her portrayal of Addy on AMC’s The Walking Dead won her recognition and admiration from fans around the world. She brought vulnerability, strength, and humanity to the post-apocalyptic world of the show, and her presence onscreen resonated with viewers far and wide.

Beyond her work in film and television, Kelley was also a creative behind the camera, working on independent film projects and advocating for inclusive storytelling in Hollywood. She was described by friends and peers as fiercely intelligent, warm-hearted, and endlessly curious. Her kindness radiated in every room she entered, and her passion for creativity left a mark on every set she worked on.

In the days since her passing, tributes have poured in from co-stars, collaborators, fans, and loved ones. Many remember her as a bright light who not only excelled in her craft but also uplifted and encouraged those around her. Her legacy will live on in the lives she touched and the stories she told.

Her family has requested privacy during this incredibly difficult time but expressed deep gratitude for the outpouring of love and support. They also noted how much Kelley cherished her fans, and how she found strength in their messages throughout her journey.

Kelley Mack was a gifted artist, a cherished daughter, a beloved friend, and a fighter. Though she left this world far too soon, her impact will remain in the memories she created, the art she left behind, and the lives she touched.

May she rest in peace.